40203693889 has 4 divisors (see below), whose sum is σ = 40862770900. Its totient is φ = 39544616880.

The previous prime is 40203693883. The next prime is 40203693931. The reversal of 40203693889 is 98839630204.

40203693889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 640494864 + 39563199025 = 25308^2 + 198905^2 .

It is a cyclic number.

It is not a de Polignac number, because 40203693889 - 2⁹ = 40203693377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40203693883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329538414 + ... + 329538535.

It is an arithmetic number, because the mean of its divisors is an integer number (10215692725).

Almost surely, 2^40203693889 is an apocalyptic number.

It is an amenable number.

40203693889 is a deficient number, since it is larger than the sum of its proper divisors (659077011).

40203693889 is an equidigital number, since it uses as much as digits as its factorization.

40203693889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659077010.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 40203693889 in words is "forty billion, two hundred three million, six hundred ninety-three thousand, eight hundred eighty-nine".